库水位下降速率对库岸老滑坡间歇性复活的影响

库水位波动对库岸涉水滑坡的变形失稳有重要影响,以白家包滑坡为例,根据野外勘察资料和GPS监测数据分析滑坡变形特征,利用Geo-Studio软件对不同工况下滑坡渗流场和位移变形进行了模拟分析,并研究了滑坡在6种不同工况下的稳定性。结果表明,白家包滑坡位移变形呈阶梯陡坎状,间歇性增长,滑坡变形规律与库水位调度规律同步吻合;库水位下降主要影响滑坡前缘,库水位下降速率越大,位移变形速率越大,位移变形量越大;库水位下降时,稳定性系数一直减小,下降速率越大,滑坡越容易发生失稳破坏。

Effect of Water Level Decline Rate on Intermittent Revival of Old Landslide on Reservoir Bank

The fluctuation of reservoir water level has an important influence on the deformation and instability of wading landslide on reservoir bank landslide.This paper takes Baijiabao landslide as an example.Firstly,according to the field survey data and GPS monitoring data,the deformation law of landslide is analyzed.By using Geo-Studio software,the seepage field and displacement deformation of landslide under different working conditions are simulated,and the stability of landslide under six working conditions are analyzed.The results show that the displacement and deformation of Baijiabao landslide are characterized by"step"shape,and the regularity of landslide deformation coincides with the regulation of reservoir water level.The decline of reservoir water level mainly affects the front of landslide.The larger the water level descending rate is,the larger the displacement deformation rate and the larger the displacement deformation amount are.When the reservoir water level drops,the stability coefficient continuously decreases.The greater the decline rate is,the more likely the landslide will be destroyed.